M37754M6C-XXXGP View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

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M37754M6C-XXXGP

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

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MITSUBISHI MICROCOMPUTERS

M37754M6C-XXXGP

M37754M6C-XXXHP

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

PIN DESCRIPTION (MICROCOMPUTER MODE)

Pin

VCC, VSS

CNVSS

Name

Power supply

CNVSS input

RESET

Reset input

XIN

XOUT

E

Clock input

Clock output

Enable output

BYTE

(Note)

AVCC,

AVSS

VREF

P00–P07

Bus width select input

Analog supply input

Reference voltage input

I/O port P0

P10–P17 I/O port P1

P20–P23,

P27

P30–P33

I/O port P2

I/O port P3

P40–P47 I/O port P4

P50–P57 I/O port P5

P60–P67 I/O port P6

P70–P77

P80–P87

I/O port P7

I/O port P8

P90–P95 I/O port P9

Input/

Output

Input

Input

Input

Output

Output

Input

Input

I/O

I/O

I/O

I/O

I/O

I/O

I/O

I/O

I/O

I/O

Functions

Supply 5 V±10 % to VCC and 0 V to VSS.

This pin controls the processor mode. Connect to VSS for single-chip mode or

memory expansion mode. Connect to VCC for microprocessor mode.

This is reset input pin. The microcomputer is reset when supplying “L” level to this

pin.

These are I/O pins of internal clock generating circuit. Connect a ceramic or quartz-

crystal resonator between XIN and XOUT. When an external clock is used, the clock

source should be connected to the XIN pin and the XOUT pin should be left open.

This pin outputs enable signal E, which indicates access state of data bus for

single-chip mode.

This pin outputs RD signal for memory expansion mode or microprocessor mode.

This pin determines whether the external data bus is 8-bit width or 16-bit width for

memory expansion mode or microprocessor mode. The width is 16 bits when “L”

signal inputs and 8 bits when “H” signal inputs.

Power supply for the A-D converter and the D-A converter. Connect AVCC to VCC

and AVSS to VSS externally.

This is reference voltage input pin for the A-D converter and the D-A converter.

In single-chip mode, port P0 is an 8-bit I/O port. This port has an I/O direction

register and each pin can be programmed for input or output. These ports are in

the input mode when reset. Address (A0–A7) is output in memory expansion mode

or microprocessor mode.

In single-chip mode, these pins have the same functions as port P0. Address (A8–

A15) is output in memory expansion mode or microprocessor mode.

In single-chip mode, these pins have the same functions as port P0. Address (A16–

A19, A23) is output in memory expansion mode or microprocessor mode.

In single-chip mode, these pins have the same functions as port P0. In memory

expansion mode or microprocessor mode, WR, BHE , ALE, and HLDA signals are

output.

In single-chip mode, these pins have the same functions as port P0. In memory

expansion mode or microprocessor mode, P40, P41, and P42 become HOLD and

RDY input pins, and clock φ1 output pin respectively. Functions of other pins are the

same as in single-chip mode. In memory expansion mode, P42 can be pro-

grammed as I/O port.

In addition to having the same functions as port P0 in single-chip mode, these pins

also function as I/O pins for timer A0, timer A1, timer A2, timer A3, output pins for

motor drive waveform, and input pins for key input interrupt.

In addition to having the same functions as port P0 in single-chip mode, these pins

also function as I/O pins for timer A4, input pins for external interrupt input INT0,

INT1, and INT2, and input pins for timer B0, timer B1, and timer B2.

In addition to having the same functions as port P0 in single-chip mode, these pins

also function as input pins for A-D converter.

In addition to having the same functions as port P0 in single-chip mode, these pins

also function as I/O pins for UART0, UART1, output pins for D-A converter, and

input pin for INT4.

In addition to having the same functions as port P0 in single-chip mode, these pins

also function as input pin for INT3, output pins for motor drive waveform.

In memory expansion mode and microprocessor mode, these pins can be

programmed as address (A20–A22) or output pins for CS0–CS4.

Note: It is impossible to change the input level of the BYTE pin in each bus cycle. In other words, bus width cannot be switched dynamically. Fix the input

level of the BYTE pin to “H” or “L” according to the bus width used.

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